Follow these instructions if you installed Adaptive Server with Job Scheduler enabled.
use sybmgmtdb go sp_js_wakeup "stop_js", 1 go
isql -Usa -P<sa password> -S<servername> -n -i$SYBASE/$SYBASE_ASE/scripts/installjsdb -o<output file>
Save the output of this step to an operating system file.
1> use sybmgmtdb 2> go 1> sp_js_wakeup "start_js", 1 2> go